San Mateo County California ZIP Codes - Map and Full List

San Mateo County California is covered by a total of 39 ZIP Codes. There are 2 ZIP Codes in San Mateo County that extend into adjacent counties (Santa Clara County, and Santa Cruz County). Of the ZIP codes within or partially within San Mateo County there are 28 Standard ZIP Codes, 1 Unique ZIP Codes and 9 PO Box ZIP Codes.

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San Mateo County California ZIP Code Map

Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of San Mateo County and can be turned on and off. Each type of postal code can also be turned on and off.

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